US3643412A - Method and apparatus for the production of crimped yarns - Google Patents

Method and apparatus for the production of crimped yarns Download PDF

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Publication number
US3643412A
US3643412A US861309A US86130969A US3643412A US 3643412 A US3643412 A US 3643412A US 861309 A US861309 A US 861309A US 86130969 A US86130969 A US 86130969A US 3643412 A US3643412 A US 3643412A
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United States
Prior art keywords
yarns
yarn
turning
multiply
multiply yarn
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Expired - Lifetime
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US861309A
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English (en)
Inventor
Yutaka Maeda
Hiroshiro Kimura
Akio Koshimo
Nagamasa Kanzaki
Katsumi Yasuzuka
Yoshinobu Furukawa
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Nippon Rayon Co Ltd
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Nippon Rayon Co Ltd
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/028—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by twisting or false-twisting at least two filaments, yarns or threads, fixing the twist and separating the filaments, yarns or threads

Definitions

  • crimped yarns refers to yarns consisting of one or more endless filaments or fibers.
  • the yam material of such yarn includes at least in part of synthetic thermoplastic materials especially polyamide, polyethylene terephthalate, polyacrylonitrile, polyolefine, and the like.
  • Apparatus and process for the crimping of textile yarns are known according to which at least two yarns are twisted together in a twisting zone while being subjected to heating so as to be under a plastic state at least in a part of the zone, and are then separated into individual yarns by being pulled apart in different directions and at the same speed.
  • the object of the present invention is to provide a method and an apparatus referred to at the beginning of which the breakage of the yarns during the operation can be avoided.
  • Another object of the present invention is to provide a method and apparatus of which the separating point is maintained constant during the operation.
  • FIG. I is an elevational view of an embodiment of the apparatus according to the present invention in which both the feeding zone and initial twisting zone are not shown,
  • FIG. 2 is a side view of the apparatus shown in FIG. I, in which the drawoff roller is not shown,
  • FIG. 3 is a plan view of the stationary yarn guide employed in the apparatus shown in FIG. I,
  • FIG. l is a schematic representation of one form of the feeding zone and the twisting zone according to the present inventlon,
  • FIG. 5 is an elevational view of another embodiment of the apparatus according to the present invention, in which both the feeding zone and twisting zone are not shown,
  • FIG. 6 is a side view of the apparatus of FIG. 5,
  • FIG. 7 is an elevational view of a further embodiment of the apparatus according to the present invention in which both the feeding zone and twisting zone are not shown,
  • FIG. 8 is a side view of the apparatus shown in FIG. 7.
  • FIG. 9 is an elevational view of a still further embodiment of the apparatus according to the present invention in which the feeding zone and twisting zone are not shown.
  • FIG. III is a side view of the apparatus as shown in FIG. 9.
  • the present method for solving the aforementioned problems is characterized mainly in that at least two yarns pretwisted together are turned at the separating point in the same direction as that of the initial pretwisting and then each of the separated yarns is turned in the same direction. Yarns pretwisted together in an S-direction should be turned at the separating point in a counterclockwise direction when viewed along the yarn running direction and then each of individual yarns separated therefrom should be turned in the same direction, whereas, yarns pretwisted together in a Z-direction LII should be turned at the separating point in a clockwise direction when viewed along the yarn running direction and then each of individual yarns separated therefrom should be turned in the same direction.
  • the separating point is apt to fluctuate longitudinally as the yarns run.
  • certain forces are set up which overstress the yarns and cause the breakage of the yarns.
  • the present invention therefore is directed to maintaining the separating point constant during the operation by turning both the twisted yarns and the separated yarns, i.e., by preventing the separating point from shifting toward the drawoff roller as the yarns run.
  • a rotatable hollow spindle is found preferable for the purpose of turning the yarns, wherein the yarn is wrapped around a snubbing bar and passed through the hollow spindle.
  • a moving friction means is also found preferable for turning the yarn.
  • the yarn can be treated under constant tension by a frictional force occurring between the surface of the moving friction means and the yarn running in frictional contact with the surface of the friction means.
  • the surface of the moving friction means be made of a elastic material having a suitable hardness, for example, a shore hardness of from to 90, such as natural rubber, polyurethane, polybutadiene, polychloroprene, nitrilbutyl and the like, each of which should have good anti-abrasion properties.
  • yarns may be heated in the twisting zone and/or in the feeding zone so as to be in a plastic state at least in a part of the twisting zone.
  • At least three rotatable hollow spindles may be used as a yarn turning means.
  • At least two moving friction means such as, rotating discs, moving endless belts, and the like, may be used as a yarn turning means.
  • a rotatable ring may be advantageously used as the yarn turning means.
  • the term ring herein used is to be understood as including a doughnut-shaped ring, a short tube, a disc having a hole at its center, and the like.
  • the yarns pretwisted together are brought in contact with one side surface of the ring, are separated into individual yarns, and the individual separated yarns thereafter are brought in contact with opposite side surfaces of the ring, whereby the yarns twisted together are turned in the same direction as that of the initial pretwisting and the individual yarns are turned in the same direction as that of the initial pretwisting.
  • FIGS. I to 3 one embodiment of the present invention is illustrated in FIGS. I to 3, in which a rotatable ring is provided as a yarn turning means.
  • FIGS. I and 2 both the feeding zone and the twisting zone are not shown and only an end section of a pretwisted yarn l is shown.
  • Yarns 2 and 3 to be crimped are fed by feeding means defined by pairs of rollers A and 5 (see FIG. 4) with a constant speed over freely rotatable guide rollers 6a and 6b, to a twisting zone in which the yarns between points 9 and I0 (FIG. I and I) are twisted together and heated by heating appliance 6 for the purpose of heat setting the false twist thus produced.
  • FIG. I and I the twisting zone in which the yarns between points 9 and I0 (FIG. I and I) are twisted together and heated by heating appliance 6 for the purpose of heat setting the false twist thus produced.
  • the end section of the twisted yarn 1 runs over the front side surface and then through the center hole of the ring 15 to the back side surface in frictional contact with these surfaces along a selected length of the yarns, so that the twisted yarn 1 and separated yarns 2 and 3 are turned by being brought into contact with the rotatable ring 15, for a purpose to be made clear.
  • Yarns 2 and 3 divergently separated at separating point are guided through a small hole 21 provided at the end of stationary yarn guide 14 (FIG. 3), the location of which is usually selected substantially on the center axis of the ring.
  • the separated yarns run thereafter to drawoff rollers 11 and 12 over freely rotatable guide rollers 7 and 8.
  • the ring 15 should be rotated in a counterclockwise direction when viewed from the front side of the ring in the instance where the pretwisted yarn has S-twist, whereas clockwise rotation should be applied to the ring in the instance where the pretwisted yarn has Z-twist as shown in FIG. 1.
  • the ring 15 is rotatably supported by a stationary ring 16 having ball bearings 20.
  • the core of the ring 15 is made of a magnetizable material and the surface of the ring is made of rubber.
  • a magnetic disc 19 (FIGZ mounted on a driven shaft 18, so that the ring may be rotated by a magnetic force of the magnetic disc.
  • Stationary yarn guide 14 is arranged so as to face the front side of the ring 15, and is screwed to an end of rod 17.
  • the stationary yarn guide has a small hole 21 in a manner such that the hole is located substantially at the center of the ring 15.
  • FIG. 5 and 6 differs from the above-described embodiment by the fact that the ring 15, yarn turning means, is replaced by two rotating discs 22 and 23 mounted on a driven shaft 24.
  • the end section of the pretwisted yarn l is brought into contact with the disc 22 and the separated yarns 2 and 3 are brought into contact with the disc 23.
  • the separated yarns 2 and 3 run through hole 21 of the stationary yarn guide 14 to the drawoff rollers 11 and 12.
  • the discs 22 and 23 should be rotated in a clockwise direction when viewed along the yarn running direction, whereas in the case where the twisted yarn has a Z-twist the discs rotate in a counterclockwise direction.
  • At least the surfaces of the discs 22 and 23 are made of rubber for providing a frictional surface which is effective to rotate the running yarn.
  • Still another embodiment illustrated in FIG. 7 and 8 differs from the aforementioned embodiments by the fact that the ring or discs are replaced by three rotatable hollow spindles all of which have similar snubbing bars at their top.
  • the end section of the pretwisted yarn 1 passes through the first hollow spindle 25, being wrapped around the bar 26 for the purpose of being turned as the spindle rotates.
  • the yarns 2 and 3 Having been separated at the separating point 10 a short distance after the bar 26, the yarns 2 and 3 then run respectively through the second hollow spindles 27a and 27b after passing through the hole 21 of the stationary yarn guide 14, and over the freely rotatable guide rollers 7' and 8.
  • the operation is similar to that shown in FIGS. 5 and 6 but includes two endless belts 29 and 30 spaced apart but parallel to each other which are used instead of the ring, discs or hollow spindles of the other embodiments.
  • the pretwisted and heatset ply yarn 1 passes over the first upper endless belt 29 driven by pulleys 31 and 31' frictionally engaging therewith.
  • the ply yarn then passes through an eye or guide 21 formed at the end of bar 14 mounted on a fixed part of the apparatus.
  • the ply yarn which in this instance is formed of two yarns, is divided or separated into two yarns 2 and 3 at a position just slightly prior to the eye 21.
  • the yarns then pass two pairs of feed or drawoff rollers 11 and 12 respectively and thence to the takeup bobbins not shown.
  • the ring 15 of FIG. 1 may be provided with a gear concentric to the ring for driving the ring in mesh with any driving gear in a manner that will be apparent to those skilled in the art.
  • one or more hollow spindles may be used in combination with one or more moving friction means hereinabove mentioned in such a manner that for example the pretwisted yarn may pass through a hollow spindle and the separated yarns thereafter pass by the turning disc in frictional contact with peripheral edge of the disc.
  • the yarn can be treated at the speed of from 400 to 1,200 meters per minute by the use of the method of the present invention.
  • a method for producing crimped yams composed at least in part of synthetic thermoplastic materials which comprises:
  • Apparatus for producing crimped yarn composed at least in part of synthetic thermoplastic materials comprising,
  • a first turning means for turning the multiply yarn in the same direction as that of the initial pretwist of the at least two yarns to form the multiply yarn
  • second turning means for turning each of the separated yarns in the same direction as that of the initial pretwist of the at least two yarns to form the multiply yarn, said second turning means being located between the point of separation and the drawing means.
  • said first turning means comprises a rotatable hollow spindle provided with a snubbing bar across the axis thereof, the multiply yarn passing over said bar in winding relation therewith while passing through the hollow spindle so that the yarn is turned.
  • said first turning means includes a moving means having a friction surface which engages the multiply yarn so as to turn the multiply yarn.
  • the friction surface is composed of a material selected from the group consisting of natural rubber, polyurethane, polybutadiene, polychloroprene, nitrilbutyl and mixtures thereof.
  • said second turning means comprises at least two hollow spindles each including a snubbing bar across the axis thereof, the separated yarn passing over said bars in winding relation therewith while passing through the hollow spindle so that the separate yarns are turned.
  • first turning means and said second turning means comprise a single rotatable annular ring, diametrically opposed surfaces thereof forming said first and second turning means respectively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US861309A 1969-07-18 1969-09-26 Method and apparatus for the production of crimped yarns Expired - Lifetime US3643412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5683169 1969-07-18

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US3643412A true US3643412A (en) 1972-02-22

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US861309A Expired - Lifetime US3643412A (en) 1969-07-18 1969-09-26 Method and apparatus for the production of crimped yarns

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US (1) US3643412A (de)
CH (2) CH531583A (de)
DE (1) DE1946622A1 (de)
FR (1) FR2051825A1 (de)
GB (1) GB1268142A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782088A (en) * 1971-08-05 1974-01-01 Courtaulds North America Inc False twister
US3802175A (en) * 1971-03-08 1974-04-09 Ici Ltd Apparatus and process for producing twist in textile yarns
US3812664A (en) * 1971-07-27 1974-05-28 Barmag Barmer Maschf Continuous crimping of yarns
US3816988A (en) * 1971-02-03 1974-06-18 Bayer Ag Process and an apparatus for the production of synthetic, crimped, highly elastic endless yarn
US3835631A (en) * 1971-12-23 1974-09-17 Barmag Barmer Maschf Apparatus and method for treating thermoplastic yarns
US3863434A (en) * 1971-07-21 1975-02-04 Werner Doschko False twisting of yarn
US3869853A (en) * 1972-03-07 1975-03-11 Ici Ltd Friction bush
US3938314A (en) * 1974-05-10 1976-02-17 E. I. Du Pont De Nemours And Company False-twist texturing process with hollow friction twist tubes
WO2005087987A2 (de) * 2004-03-09 2005-09-22 Trevira Gmbh Falschdrahttexturiertes monofilament
US20110154798A1 (en) * 2008-07-30 2011-06-30 Invista North America S.A.R.L. Systems and methods of twisting and heat-setting yarn, and apparatus for twisting yarn and heat-setting yarn

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111211A (en) * 1935-10-25 1938-03-15 Celanese Corp Apparatus for the treatment of textile materials
GB991000A (en) * 1960-08-29 1965-05-05 Atomic Energy Authority Uk High speed rotor systems
US3355872A (en) * 1963-12-20 1967-12-05 Klinger Mfg Co Ltd Methods and apparatus for crimping yarns
US3445996A (en) * 1967-05-08 1969-05-27 Turbo Machine Co Preheating in yarn texturing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111211A (en) * 1935-10-25 1938-03-15 Celanese Corp Apparatus for the treatment of textile materials
GB991000A (en) * 1960-08-29 1965-05-05 Atomic Energy Authority Uk High speed rotor systems
US3355872A (en) * 1963-12-20 1967-12-05 Klinger Mfg Co Ltd Methods and apparatus for crimping yarns
US3445996A (en) * 1967-05-08 1969-05-27 Turbo Machine Co Preheating in yarn texturing

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816988A (en) * 1971-02-03 1974-06-18 Bayer Ag Process and an apparatus for the production of synthetic, crimped, highly elastic endless yarn
US3802175A (en) * 1971-03-08 1974-04-09 Ici Ltd Apparatus and process for producing twist in textile yarns
US3863434A (en) * 1971-07-21 1975-02-04 Werner Doschko False twisting of yarn
US3812664A (en) * 1971-07-27 1974-05-28 Barmag Barmer Maschf Continuous crimping of yarns
US3782088A (en) * 1971-08-05 1974-01-01 Courtaulds North America Inc False twister
US3835631A (en) * 1971-12-23 1974-09-17 Barmag Barmer Maschf Apparatus and method for treating thermoplastic yarns
US3869853A (en) * 1972-03-07 1975-03-11 Ici Ltd Friction bush
US3938314A (en) * 1974-05-10 1976-02-17 E. I. Du Pont De Nemours And Company False-twist texturing process with hollow friction twist tubes
WO2005087987A2 (de) * 2004-03-09 2005-09-22 Trevira Gmbh Falschdrahttexturiertes monofilament
WO2005087987A3 (de) * 2004-03-09 2005-12-01 Trevira Gmbh Falschdrahttexturiertes monofilament
US20110154798A1 (en) * 2008-07-30 2011-06-30 Invista North America S.A.R.L. Systems and methods of twisting and heat-setting yarn, and apparatus for twisting yarn and heat-setting yarn
US8528310B2 (en) 2008-07-30 2013-09-10 Invista North America S.ár.l. Systems and methods of twisting and heat-setting yarn, and apparatus for twisting yarn and heat-setting yarn

Also Published As

Publication number Publication date
FR2051825A1 (de) 1971-04-09
DE1946622A1 (de) 1971-02-25
CH531583A (fr) 1972-08-31
GB1268142A (en) 1972-03-22
CH1473069A4 (de) 1972-08-31

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